Smoke-consumer.



No. 688,379. y Patented Dec. l0, |'9'0|.

- G. A. W. ARNHOLT.

SMOKE CONSUMER.- (Application me@ .nn'y- 2, 1901.)

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UNITED STATES e PATENT OEEICE.

GEORGEVA. W. ARNHOLT, OF PHILADELPHIA, PENNSYLVANIA.

SMOKE-CONSUMER. Y.

SPECIFICATION forming part of'Letters Patent No. 688,379, dated December 1.0,-1901.

kApplication led July 2, 1901.

To all whom it Wawy concern:

Be it known that LGEORGE AW. ARNHOLT, a citizen of the United States, residing atv Philadelphia, (post-office sam e,) in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Smoke-Consumers; and I do declare the following to-be a full,- clear, and

exact description of the invention, such as l' will enable-others skilled in the art to which` it appertains to make and use the same.

VTheinventionrelates to smoke-consumers. The object of the invention is to provide a more complete and 'effective arrangement of apparatus than has heretofore been employed.Y for this purpose, whereby substantially all the smoke and other combustible gases generated in a furnace will be consumed, thereby largely reducing the quantity of fuel employed, and thereby doing away with the smokestacks and uptakes heretofore used for carrying oif the productsof combustion and preserving the atmosphere from contamination by the discharge therein of unconsumed smoke and gases. Y Y With this and other objects in view the invention consists'of certain novel features of construction, combination, and arrangement v l. Yof.parts,which will be hereinafter more fully described, and particularly pointed out in the appended claim. v

Inthe accompanying drawing I have illustrated my invention in longitudinal vertical section, the upper end of the return-flue being distorted to showl it in perspective.

Referring to the drawing, l denotes a horizontal tubular boiler, 2 the furnace-casing, 3

the bridge-wall, 4t the nre-box, 5 the ash-pit,

. and 6 the smoke-box. Y

7 denotes a return-flue which'lea'd's from the ash-pit 5 under the bridge-wall up through the top of the furnace-casing and is provided with a cold-air-inlet opening 8 and with a branch 9, whichl projects into and communicates with the smoke-space l0 of the furnace. The bridge-wall is provided With a passage 1l, which communicates with the iue 7 at a point contiguous to that at which said iue communicates with the ash-pit 5 and communicates with the fire-box at a point 12.

13 denotes a steam-pipe leading from the steam-space in the boiler through the fursennnaesst. cromati.) Y Y nace-casing, thence into the furnace-casing at its forward end and immediately in advance of the forward end of theboile'r, thence back again under theboiler, andthence u'pwardly and provided at its rear end withY injector-nozzles which are located in the'verti cal portion ofithe flue 7 immediatelybelow the cold-air inlet 8 and branch 9j'of said flue.

In operation the unconsurned products of are combined with fresh air drawn in through the `opening 8 Vin said return-flue. In being discharged through the forward end of the return-fine 7 partof the gases and products of combustion, combined"w,ith the superheated steam and fresh air, will be discharged "combustion and gases escaping from the fireinto the ash-pit under the grate, while a part .Y

will escape through the passage 11` in the bridge-wall and be discharged over the grate Aand ata point to check or retard the escape of the fresh unconsumed gases and products of combustion and hold'them,'as it wereLin suspension and cause them to be more thoroughly consumed by the flame in the fire-box,

.which flame is augmented or intensied by ing from the spirit or sacrificing any of the advantages'thereof.

Having thus described my invention, what l' I claim, and desire to secure by Letters Patent, is-- The combination with a furnace-casing and IOO its ash-pit, its fire-box, and a bridge-Wall, of a tubular boiler supported above said bridgewall to form a smoke-passage therebetween, a return-flue extending from the ash-pit to the rear of the casing and thence communieating with the smoke-space in the casing above the boiler, and With the atmosphere, said ue at a point adjacent to that end communicating with the ash-pit being provided with au opening, and said bridge-wall being provided with a passage which communicates at one end with said opening and at the other end with the fire-box at a point contiguous to the escape of the products of combustion from said fire-box into the smoke-space beneath the boiler, and an injector for forcing the smoke and products of combustion from the smoke-space above the boiler and fresh air through said flue under the grate and into the fire-box, substantially as set forth.

In testimony whereof I have hereunto set my hand in presence of two subscribing witmesses.

GEORGE A. W. ARNHOLT.

Witnesses:

CHARLES P. ARNHOLT, ANDREW SCHIMMEL, Jr. 

